I let them go in places where no one can hear them in exception to the internet.
If it's so personal that you feel you can't tell anyone close to you, do find yourself a Counsellor. Nothing worse than bottling something up.
That's why i found this site. I let it all out here. If i'm too embarrassed i post it in an anonymous confession.
My mind is wired much different to where keeping things to myself doesn't have such of a bottled effect. I don't know what's up with me though, so don't take my word for it...
Not only bad but dangerous to you if anyone finds out you know. Find a safe way of telling what you know and go for it.
I bottle them until I blow. I don't recommend it.